Scientific and Technical Computing

In this module some of the basic aspects of computer networks are presented in two lessons
. In lesson  the historical background of computer networks is presented
. Then different type of networks and their classification on the basis of transmission technology and scale are considered
. In the next section important applications of computer networks, which spans over different areas in a common man life are discussed
. Lesson  presents the important concepts of layering
. The basic terminologies in the context of layered architecture are also covered in this section
. Then this lesson provides an introduction of PSI layered architecture - Open System Interconnection Reference Model
. Basic functionalities of different layers of PSI and concept of service access points and information exchange will also be dealt in this lesson.